Hi GV, I would believe it to be around mid 1970, movement does not look to be one of the very early ones, nor does dial and hands, the case number though seems to be rather early, hence we could guess it is in the range of the first 900 Monacos produced, if we say a max production out put was 1200 Monacos per year, mid 1970 would be realistic.
Cheers
Arno
www.heuerchronographs.com
: dear friends,
: i would wish to know the year of production of my monaco 1133b.the
: serial number is 157971.
: the calibre 11 semms to be the first esecution.
: thanks for the help.
: 
